/* User functions for run-time dynamic loading. Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef _DLFCN_H #define _DLFCN_H 1 #include <features.h> /* The MODE argument to `dlopen' contains one of the following: */ #define RTLD_LAZY 0x001 /* Lazy function call binding. */ #define RTLD_NOW 0x002 /* Immediate function call binding. */ #define RTLD_BINDING_MASK 0x3 /* Mask of binding time value. */ /* If the following bit is set in the MODE argument to `dlopen', the symbols of the loaded object and its dependencies are made visible as if the object were linked directly into the program. */ #define RTLD_GLOBAL 0x100 /* If the first argument of `dlsym' is set to RTLD_NEXT the run-time address of the symbol called NAME in the next shared object is returned. The "next" relation is defined by the order the shared objects were loaded. */ #define RTLD_NEXT ((void *) -1l) __BEGIN_DECLS /* Open the shared object FILE and map it in; return a handle that can be passed to `dlsym' to get symbol values from it. */ extern void *dlopen __P ((__const char *__file, int __mode)); /* Unmap and close a shared object opened by `dlopen'. The handle cannot be used again after calling `dlclose'. */ extern int dlclose __P ((void *__handle)); /* Find the run-time address in the shared object HANDLE refers to of the symbol called NAME. */ extern void *dlsym __P ((void *__handle, __const char *__name)); #ifdef __USE_GNU /* Find the run-time address in the shared object HANDLE refers to of the symbol called NAME with VERSION. */ extern void *__dlvsym __P ((void *__handle, __const char *__name, __const char *__version)); extern void *dlvsym __P ((void *__handle, __const char *__name, __const char *__version)); #endif /* When any of the above functions fails, call this function to return a string describing the error. Each call resets the error string so that a following call returns null. */ extern char *dlerror __P ((void)); /* Fill in *INFO with the following information about ADDRESS. Returns 0 iff no shared object's segments contain that address. */ typedef struct { __const char *dli_fname; /* File name of defining object. */ void *dli_fbase; /* Load address of that object. */ __const char *dli_sname; /* Name of nearest symbol. */ void *dli_saddr; /* Exact value of nearest symbol. */ } Dl_info; extern int dladdr __P ((void *__address, Dl_info *__info)); __END_DECLS #endif /* dlfcn.h */